Add PHP 8.3 support

[hoogi91]

Q	A
Bug fix?	yes
New feature?	no
BC breaks?	no
Deprecations?	no
Tests pass?	yes
Fixed tickets	#539 #542

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.86%. Comparing base (ba76a2a) to head (0a93a28).
Report is 69 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #568      +/-   ##
===========================================
- Coverage   100.00%   99.86%   -0.14%     
===========================================
  Files           21       21              
  Lines          743      743              
===========================================
- Hits           743      742       -1     
- Misses           0        1       +1     

Flag	Coverage Δ
phpunit	99.86% <100.00%> (-0.14%)	⬇️

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